2, 2'-Bipyridyl N,”-dioxide, ita derivatives substituted at the 4-andlor 4'-positions by methoxy, nitro, chloro, and bromo groups, and the corresponding N, N'-deoxygenated compounds have been synthesized. The N,”-dioxides were examined in a number of refluxing solvents and under sublimation to investigate a potential liberation of singlet oxygen. All N,”-dioxides were found to be stable under such conditions with no production of the corresponding N, ...
